Carbureter for explosive-engines.



No. 693,773. Patented Feb. l8, I902, A. F. BARDWELL.

CABBURETER FOB EXP LOSIVE ENGINES.

(Application filed Oct. 20. 1900.) (No Model.) 2 Sheets'Sheet I.

' No. 693,773. Patented Feb. l8, I902.

A. F. BA'RDWELL.

GABBURETER FDR EXPLOSIVE ENGINES.

(Application filed Oct. 20, 1900.) (No Model.) 2 Sheets-Sheet 2.

ARTHUR F. BARDWELL, OF MOUNT VERNON, NEW YORK, ASSIGNOR To THE DAIMLER MANUFACTURING COMPANY, OF LONG ISLAND CITY, NEW YORK, A CORPORATION OF NEW YORK.

CARBURETER FOR EXPLQSlVE-ENGINES.

SPECIFICATION forming part of Letters Patent No. 693,773, dated February 18, 1902.

Application filed October 20, 1900. Serial No. 33,716. (No model.)

T to whom, it may concern:

Be it known that I, ARTHUR F. BARDWELL, a citizen of the United States, and a resident of Mount Vernon, New York, have invented certain Improvements in Oarbureters, of

which the following is a specification.

The object of my invention is to construct a simple and effective carburetor for use in connection with gasolene-engines. This ob- IO ject I attain in the following manner, reference being bad to the accompanying drawings, in which- Figure l is a longitudinal sectional view of my improved carbureter. Fig. 2 is a side view. Fig. 3 is a plan view; and Fig. 4 is a section on the line 4 4, Fig. 1.

A is the casing of the carburetor, having two chambers B and D. This casing is made in a single casting, and secured to the casing is a cap-plate E, having the gas-chamber E. The cap-plate is secured to the casing by bolts 6.

The chamber D is the receiving-chamber for the gasolene, and the chamber 13 is the carbureting-chamber proper.

cl is the inlet for the gasolene. The inlet is formed in a boss projecting from the under side of the casing A and a pipe leading from the gasolene-tank is coupled to this boss in any suitable manner, in the present instance by means of a screw-coupling.

F is a needle-valve, having a tapered point f, which can be seated at d in the inlet-passage d. This needle-valve extends through the chamberD and through an opening in the boss 6 on the cap E.

The needle-valve F is grooved longitudinally directly above its conical point f and at the point where it finds its upper bearing in the boss 8. The valve is so formed that when it is raised off its seat (1 gasolene will be admitted to the chamber D and entrapped air will escape through the upper channels. A threaded cap is screwed onto the boss 6 and has an air-vent a The cap prevents the overflow of gasolene should the chamber D become flooded and also acts to protect the valve-stem.

To regulate the flow of gasolene into the chamber D, I provide a float D, mounted within the chamber and arranged to slide upon and be guided by the needle-valve F.

Pivoted at g g to a bracket e projecting from the under side of the cap E, are levers G. The short arms of these levers engage a collar 5 5 f, secured to the needle-valve F, and the long arms of the levers are preferably on larged or weighted and rest upon the upper end of the float D, so that when gasolene is admitted to the chamber D and under slight 6o pressure the float is elevated, causing the long arms of the levers to be raised, the sleeve f and the valve-rod F will be forced down toward the seat 61 and in time the valve will be closed. As soon as the gasolene recedes 65 the float D falls and the weighted levers G elevate the valve F and cause it to move off its seat, allowing gasolene to enter through the inlet-passage d. The air-vent e is also important, as it not only allows for the escape of entrapped air, but also, if the gasolene should form gas by excessive outward heat, the gas can blow oif through this opening, and by providing this opening the gas can flow freely into and out of the chamber and maintain a uniform level.

In the carbureting-chamber B is situated a detachable bushing I. This bushing has a contracted neck 41, and is flanged at each end to fit the casing, as clearly shown in Fig. 1. The neck of the bushing varies according to the size of the engine to which the carburetor is attached, as it controls the flow of air through the carbureter.

b is an outlet-passage leading from the chamber D to the nozzle 17, having a passage 1) at right angles to the passage 1) in the present instance. This nozzle extends up to a point directly below the contracted neck of the bushing I and has a flared opening, form- 0 ing a valve-seat for the needle-valve I-I, having a needle-point h.

In the present instance the angle of the valve-seat is about ninety degrees, while the angle of the needle-valve is considerably less. By this arrangement the gasolene is allowed to flow slightly over the valve-seat; but the flow of gasolene can be entirely out off by ad justing the valve H. This valve has a key It, arranged to slide in a keyway in the cross-bar i of the bushing I, and the upper end 77, of the valve-rod His screw-threaded, and onto the threaded end is screwed a nut J, having external threads j, which'mesh with threads in the projecting portion E of the cap. In the present instance one of the threads is cut forty to the inch and the other forty-two. This enables the operator to adjust the needlevalve to a microscopic degree by simply turningthe leverj of the nut J in one direction or the other. The nut J is held in the adjusted position in the present instance by a setscrewj (Shown in the plan view, Fig. 3.) In some instances the valve-rod Il may be secured directly to the nut J when the microscopic adjustment is not desired.

Directly above the bushing I is a screen K, which is used for the purpose of thoroughly mixing the vaporized gasolene. A screen K is used at the bottom of the bushing for the purpose of preventing foreign matter entering the carburetor and may be omitted in some instances.

The pipe leading to the gas-engine is coupled to the neck E projecting from one side of the chamber E.

In the side of the chamber D is a gageglass c, which can be secured in any suitable manher, and in the present instance is fastened in position by'a plate 0, so that the height of gasolene in the reservoir D will readily show through the glass.

The operation of my improved carburetor is as follows: It is coupled to the gasolene enthe mixing of the air and gasolene in the right proportions.

I claim as my invention- 1. The combination in a carburetor, of a single casting having two chambers therein,

one a gasolene-chamber, the other a carbureting-chamber, a passage forming communication between the two, a detachable bushing in the carbureting-chamber having a contracted neck, a cap-plate covering both chambers, a valve-stem carried by the cap-plate and controlling the flow of gasolene to the carbureter-chamber, and an automatic valve in the gasolene-chamber guided by the casing and the cap-plate, substantially as described.

2. The combination of a casing divided into two chambers, one a gasolene-receiving chamher, the other a carbureting-chamber, a passage forming communication between the gasolene-chamber and the carbureting-chamber, a detachable bushing having a contracted neck and flared at its upper end, a valve-seat at the lower portion of the neck, a cap-plate, a screw-valve carried by the cap-plate and guided by the bushing, said valve being arranged to rest upon said seat and controlling the flow of liquid from the gasolene-chamber to the carbureting-chamber, substantially as described.

3. The combination of a carbureter, a casing having two chambers, one a gasolene-receiving chamber, the other a carburetingchamber, an inlet-opening in the bottom of the gasolene-chamber, a cap-plate covering.

both of said chambers, a valve to control the flow of liquid in the gasolene-chamber, said valve being guided at its lower end in the casing and at the upper end in the cap-plate,- a float, levers pivoted to the cap-plate and engaging the stem of the valve, said levers being controlled by the float, a bushing having a reduced neck, a passage forming communication between the gasolene-ehamber and the carbureting-chalnber, said passage ending at the lower portion of the neck in the said bushing, a valve carried by the cap-plate and arranged to control the passage of fiuid through said passage into the carbureter, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARTHUR F. BARDWELL.

Witnesses:

CHAS. W. MoFFETT, ALBERT GRAFF. 

